--- a/src/HOL/Library/Library.thy	Tue Aug 22 21:36:48 2017 +0200
+++ b/src/HOL/Library/Library.thy	Wed Aug 23 01:05:39 2017 +0200
@@ -30,6 +30,7 @@
   Function_Division
   Function_Growth
   Fun_Lexorder
+  Going_To_Filter
   Groups_Big_Fun
   Indicator_Function
   Infinite_Set